Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16741
Impact of forest type and management strategy on avian densities in the Mississippi Alluvial Valley, USA Impact of forest type and management strategy on avian densities in the Mississippi Alluvial Valley, USA
Avian territory densities were determined from 20 Breeding Bird Censuses in mature (>30 years) bottomland hardwood stand: and 18 Breeding Bird Censuses in young (6-9 years old) cottonwood (Populas deltoides) plantations in the Mississippi Alluvial Valley. Avian species richness, diversity, and territory density were greater (p 0.01) in bottomland hardwood stands than in intensively...
Authors
D.J. Twedt, R.R. Wilson, J. L. Henne-Kerr, R.B. Hamilton
Contaminant exposure and effects database for wild terrestrial vertebrates: A source for information on endocrine disrupting chemicals Contaminant exposure and effects database for wild terrestrial vertebrates: A source for information on endocrine disrupting chemicals
No abstract available.
Authors
N. H. Golden, M. A. Ottinger, Barnett A. Rattner, J.B. Cohen, L.M. Loges, R.M. Erwin
Abundance and reproduction of songbirds in burned and unburned pine forests of the Georgia Piedmont Abundance and reproduction of songbirds in burned and unburned pine forests of the Georgia Piedmont
We studied the abundance and productivity of songbirds in prescribed burned and unburned mature (>60 yr) pine forests at Piedmont National Wildlife Refuge, Georgia, during 1993-1995. We estimated species abundance, richness, and evenness using data from 312 point counts in 18 burned sites and six unburned sites. We measured gross habitat features in 0.04-ha circles centered on each point...
Authors
Donald H. White, B.R. Chapman, J.H. Brunjes, R.V. Raftovich, J.T. Seginak
Introduction Introduction
No abstract available.
Authors
M.L. Morrison, L.S. Hall, S.K. Robinson, S.I. Rothstein, D.C. Hahn, T.D. Rich
Vocalization behavior and response of black rails Vocalization behavior and response of black rails
We measured the vocal responses and movements of radio-tagged black rails (Laterallus jamaicensis) (n = 43, 26 males, 17 females) to playback of vocalizations at 2 sites in Florida during the breeding seasons of 1992-95. We used regression coefficients from logistic regression equations to model the probability of a response conditional to the birds' sex, nesting status, distance to...
Authors
M.L. Legare, W.R. Eddleman, P. A. Buckley, C. Kelly
Status of the Texas Botteri Sparrow Status of the Texas Botteri Sparrow
No abstract available.
Authors
J.T. Marshall, R. B. Clapp
The Okefenokee Swamp: Invertebrate communities and foodwebs The Okefenokee Swamp: Invertebrate communities and foodwebs
No abstract available.
Authors
K.G. Porter, A. Bergstedt, Mary C. Freeman
Conservation of grassland birds in the western hemisphere Conservation of grassland birds in the western hemisphere
No abstract available.
Authors
P.D. Vickery, P.L. Tubaro, J.M. Cardoso da Silva, B. Peterjohn, J.R. Herkert, R.B. Cavalcanti
Demography of forest birds in Panama: How do transients affect estimates of survival rates? Demography of forest birds in Panama: How do transients affect estimates of survival rates?
Estimates of annual survival rates of neotropical birds have proven controversial. Traditionally, tropical birds were thought to have high survival rates for their size, but analyses of a multispecies assemblage from Panama by Karr et al. (1990) provided a counterexample to that view. One criticism of that study has been that the estimates were biased by transient birds captured only...
Authors
J. D. Brawn, J.R. Karr, J.D. Nichols, W.D. Robinson
Effects of contaminants on Double-crested Cormorant reproduction in Green Bay, Wisconsin, USA Effects of contaminants on Double-crested Cormorant reproduction in Green Bay, Wisconsin, USA
In 1994 and 1995, Double-crested Cormorants Phalacrocorax auritus were monitored from egg-laying through 12 days of age at Cat Island, Green Bay, Wisconsin, USA. Sample eggs at hatching were analysed for organochlorines (including total PCBs, PCB congeners, and DDE), hepatic microsomal ethoxyresorufin-O-dealkylase (EROD) activity in livers of embryos, and eggshell thickness. The number...
Authors
T. W. Custer, Christine M. Custer, K. L. Stromborg, M. J. Melancon
Analysis of survival, local and seasonal movements of the Rocky Mountain population of Sandhill Cranes Analysis of survival, local and seasonal movements of the Rocky Mountain population of Sandhill Cranes
No abstract available.
Authors
Rod C. Drewien, W. L. Kendall
Sodium cyanide hazards to fish and other wildlife from gold mining operations Sodium cyanide hazards to fish and other wildlife from gold mining operations
Highly toxic sodium cyanide (NaCN) is used increasingly by the international mining community to extract gold and other precious metals through milling of high grade ores and heap leaching of low grade ores. Of the 98 million kg cyanide (CN) consumed in North America in 1989, about 80% was used in gold mining (Knudson 1990). In Canada, more than 90% of the mined gold is extracted from...
Authors
R. Eisler, D. R. Clark, Stanley N. Wiemeyer, Charles J. Henny